tracks/elm/exercises/etl/README.md in trackler-2.2.1.106 vs tracks/elm/exercises/etl/README.md in trackler-2.2.1.107

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+ new

@@ -1,17 +1,19 @@ -# Etl +# ETL We are going to do the `Transform` step of an Extract-Transform-Load. ### ETL + Extract-Transform-Load (ETL) is a fancy way of saying, "We have some crufty, legacy data over in this system, and now we need it in this shiny new system over here, so we're going to migrate this." (Typically, this is followed by, "We're only going to need to run this once." That's then typically followed by much forehead slapping and moaning about how stupid we could possibly be.) ### The goal + We're going to extract some scrabble scores from a legacy system. The old system stored a list of letters per score: - 1 point: "A", "E", "I", "O", "U", "L", "N", "R", "S", "T",